.login-wrap{
    
  background-image: url('http://demo.site.niucloud.com/admin/assets/login_index_bg-c0e47ae7.png');
  background-repeat: no-repeat;
  background-size: cover;
  height: 100vh;
  width: 100vw;
}
.flex{
    display: flex;
}
.item-center{
    align-items: center;
}
.justify-center{
    justify-content: center;
}
.flex-column{
    flex-direction: column;
}
.h-100{
    height: 100%;
}
.w-400{
    width: 400px;
}
.p-40{
    padding:  40px;
}
.bg-white{
    background: #fff;
}
.image{
    width: 100%;
    height: 100%;
}
.line-w100{
    line-height: 100vh;
}
.b-radius{
    border-radius: 10px;
    box-shadow: 0px 0px 5px 0px #999;
}
.loginBtn{
    width: 100%;
}